ASTM C1611/C1611M-14 pdf free download.Standard Test Method for Slump Flow of Self-Consolidating Concrete.
1 .1 This test method covers the determination of slump flow of self-consolidating concrete (SCC).
1 .2 The values stated in either SI units or inch-pound units are to he regarded separately as standard. The values stated in each system may not he exact equivalents: therefore, each system shall he used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
3. Terminology
3.1 For definitions of terms used in this test method, refer to Terminology C125.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 halo, n—an observed cement paste or mortar ring that has clearly separated from the coarse aggregate. around the outside circumference of concrete afler flowing from the mold.
3.2.2 spread, n—the distance of lateral flow of concrete during the slump-flow test.
3.2.3 stability, n—the ability of a concrete mixture to resist segregation of the paste from the aggregates.
3.2.4 viscosity, n—resistance of a material to flow under an applied shearing stress.
4. Summary of Test Method
4.1 A sample of freshly mixed concrete is placed in a mold either in the upright or inverted position. The concrete is placed in one lift without tamping or vibration. The mold is raised, and the concrete is allowed to spread. After spreading ceases, two diameters of the concrete mass are measured in approximately orthogonal directions. Slump flow is the average of the two diameters.
5. Significance and Use
5. 1 This test method provides a procedure to determine the slump flow of self-consolidating concrete in the laboratory or the field.
5.2 This test method is used to monitor the consistency of fresh, unhardened self-consolidating concrete and its unonfIned flow potential.
5.3 It is difficult to produce self-consolidating concrete that is both flowable and nonsegregating using coarse aggregates larger than 25 mm [1 in.]. Therefore, this test method is considered applicable to self-consolidating concrete having coarse aggregate up to 25 mm [1 in.] in size. Appendix XI provides non-mandatory visual rating criteria that may he used to classify the ability of a self-consolidating concrete mixture to resist segregation (stability).
5.4 The rate at which the concrete spreads is related to its viscosity. Appendix XI provides a non-mandatory procedure that may be used to provide an indication of relative viscosity of self-consolidating concrete mixtures.ASTM C1611/C1611M pdf download.